/*++
Copyright (c) Microsoft Corporation

Module Name: crc8.h

Abstract: 16-bit CRC lookup table declaration.

History: 
          7/7/2009: Modified by senxiang.
--*/
#pragma once
#include "const.h"
#include "sora.h"

SORA_EXTERN_C SELECTANY extern const UCHAR LUT_CRC8[256] =
{
    0x00,0x91,0xE3,0x72,0x07,0x96,0xE4,0x75,    0x0E,0x9F,0xED,0x7C,0x09,0x98,0xEA,0x7B,    0x1C,0x8D,0xFF,0x6E,0x1B,0x8A,0xF8,0x69,    0x12,0x83,0xF1,0x60,0x15,0x84,0xF6,0x67,
    0x38,0xA9,0xDB,0x4A,0x3F,0xAE,0xDC,0x4D,    0x36,0xA7,0xD5,0x44,0x31,0xA0,0xD2,0x43,    0x24,0xB5,0xC7,0x56,0x23,0xB2,0xC0,0x51,    0x2A,0xBB,0xC9,0x58,0x2D,0xBC,0xCE,0x5F,
    0x70,0xE1,0x93,0x02,0x77,0xE6,0x94,0x05,    0x7E,0xEF,0x9D,0x0C,0x79,0xE8,0x9A,0x0B,    0x6C,0xFD,0x8F,0x1E,0x6B,0xFA,0x88,0x19,    0x62,0xF3,0x81,0x10,0x65,0xF4,0x86,0x17,
    0x48,0xD9,0xAB,0x3A,0x4F,0xDE,0xAC,0x3D,    0x46,0xD7,0xA5,0x34,0x41,0xD0,0xA2,0x33,    0x54,0xC5,0xB7,0x26,0x53,0xC2,0xB0,0x21,    0x5A,0xCB,0xB9,0x28,0x5D,0xCC,0xBE,0x2F,
    0xE0,0x71,0x03,0x92,0xE7,0x76,0x04,0x95,    0xEE,0x7F,0x0D,0x9C,0xE9,0x78,0x0A,0x9B,    0xFC,0x6D,0x1F,0x8E,0xFB,0x6A,0x18,0x89,    0xF2,0x63,0x11,0x80,0xF5,0x64,0x16,0x87,
    0xD8,0x49,0x3B,0xAA,0xDF,0x4E,0x3C,0xAD,    0xD6,0x47,0x35,0xA4,0xD1,0x40,0x32,0xA3,    0xC4,0x55,0x27,0xB6,0xC3,0x52,0x20,0xB1,    0xCA,0x5B,0x29,0xB8,0xCD,0x5C,0x2E,0xBF,
    0x90,0x01,0x73,0xE2,0x97,0x06,0x74,0xE5,    0x9E,0x0F,0x7D,0xEC,0x99,0x08,0x7A,0xEB,    0x8C,0x1D,0x6F,0xFE,0x8B,0x1A,0x68,0xF9,    0x82,0x13,0x61,0xF0,0x85,0x14,0x66,0xF7,
    0xA8,0x39,0x4B,0xDA,0xAF,0x3E,0x4C,0xDD,    0xA6,0x37,0x45,0xD4,0xA1,0x30,0x42,0xD3,    0xB4,0x25,0x57,0xC6,0xB3,0x22,0x50,0xC1,    0xBA,0x2B,0x59,0xC8,0xBD,0x2C,0x5E,0xCF    
};

SORA_EXTERN_C
FINL UCHAR CalcCRC8(const UCHAR *pData, UINT uiLength, UINT nTailBits = 0)
{
    const unsigned char poly = 0xE0;
    UCHAR crc = 0xFF;
    UINT i;

    for (i = 0; i < uiLength; i++)
    {
        crc = LUT_CRC8[crc ^ pData[i]];
    }
    if (nTailBits != 0)
    {
        crc ^= pData[i] & ((1 << nTailBits) - 1);
        for(UINT i = 0; i< nTailBits; i++)
        {
            if(crc & 1 )
                crc = (crc >> 1) ^ poly;
            else
                crc >>= 1;
        }
    }
    return ~crc;
}

FINL void CalcCRC8Incremental(IN UCHAR input, IN OUT PUCHAR pCrc8)
{
    *pCrc8 = LUT_CRC8[input ^ *pCrc8];
}
